Pauli asks questions regarding Fierz's work on the H-theorem. He writes on the space of Pais and its relation to the space of Kaluza.

Pauli makes some remarks on Fierz's work on the H-theorem.

Pauli mentions in this letter Einstein's rejection of Bohm and de Broglie, and Bohr's short visit to Zürich. He also writes on Plato's concepts of space and on the theory of representation, in particular the inhomogeneous group.

Pauli suggests that Fierz publish his investigations on the Lorentz group. He writes on certain eigenfunctions of the symmetrical top and their regular representation.

Pauli makes a short reference to Jauch's work.

Pauli sends some information (in the form of questions and answers) on the state of quantum electrodynamics in connection with Fierz's visit to the USA.

Pauli writes of the meeting in Pisa and of talks with Heisenberg, Schwinger and Gell-Mann.

Pauli comments on further letters by Fierz on the Jordan theory. He makes some pessimistic remarks about the present stagnation in theoretical physics.

Pauli replies to Fierz's letter concerning Fierz's work on the H-theorem. Pauli qualifies his strong criticism of the last part of the paper, which he expressed in his previous letter.

With this letter, Pauli adds, to his previous letter written on the same day (fierz_0092-174), some empirical data about the $\pi$-meson disintegrations.